Noninvasive blood flow sensor using magnetic field parallel to skin
US5935077A · kind A · utility
109Cited by
8References
11Claims
0Family size
Inventor
Key dates
| Filing date | Aug 14, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Aug 14, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0265
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved electromagnetic blood flow sensor uses a bipolar magnetic field source to provide a varying magnetic field with a component parallel to the skin and through the blood vessel, a single sense electrode on the skin adjacent to the blood vessel, a reference electrode, and a detector that samples the sense electrode signal in synchronism to the varying magnetic field. An optional addition is a driven shield for the sense electrode to reduce the effect of noise voltages either from the magnetic field source or from stray fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.